I think SpaceX will be fine, Tesla I think you're mostly right. Tesla's valuation has been almost entirely his cult, but the shine is pretty much off that apple. There has already been some vocal outcry over his antics, and if he had a real board instead of his brother and sycophants, he'd probably already be gone. Any responsible board at this point would see that Tesla is having massive internal struggles (they ship about 60/40 cars to vaporware and have increasing issues with QA and service) and the thing it mostly had going for it was first mover advantage which they've now mostly squandered. They still have a good business with the supercharger network, and with proper leadership could still be a big player in the space, but they're about to be inundated with competition they've never really had. They've sort of already lost the cool kid premium status to Rivian and Lucid, and Model 3 is about to face competition in a way it never really has.

So all that, and the CEO is shitposting conspiracy theories on his pet project social media app that he's publicly mismanaging by basically all measures. Like I said, any real board, he'd already be out. I suspect that unless something changes, it won't be long before there will be real moves to remove him.